Imaging lens
US10067313B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 9, 2016 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | Oct 24, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging lens includes a first lens group having positive refractive power; a second lens group having positive refractive power; and a third lens group having negative refractive power, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having positive refractive power, and a third lens having negative refractive power. The second lens group includes a fourth lens and a fifth lens. The third lens group includes a sixth lens having negative refractive power and a seventh lens having negative refractive power. The first lens, the second lens, the third lens, and the seventh lens have specific Abbe's numbers. The first lens and the second lens have specific focal lengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.